[ Thanks to Falko
Timme for this link. ]
“In this article I will describe how to monitor your server with
munin and monit. munin produces nifty little graphics about nearly
every aspect of your server (load average, memory usage, CPU usage,
MySQL throughput, eth0 traffic, etc.) without much configuration,
whereas monit checks the availability of services like Apache,
MySQL, Postfix and takes the appropriate action such as a restart
if it finds a service is not behaving as expected. The combination
of the two gives you full monitoring: graphics that lets you
recognize current or upcoming problems (like ‘We need a bigger
server soon, our load average is increasing rapidly.’), and a
watchdog that ensures the availability of the monitored
services…”